The main control chip adopts WCH ch382l chip, which has strong compatibility and is suitable for long-time operation. Physical serial port with interrupt address, high stability.Standard interface external dual RS-232DB9 pin serial port, 25gb/s full duplex channel conforming to PCI Express, supporting plug and play.High speed and reliable transmission data transmission rate can be as high as 1000kbps, support RS-232 hardware flow control, and can stably and effectively control data flow loss.Supports Windows 10/7/8/ 98/xp.Colour:greenMaterial:metal, PCBPackage Contents:1 x PCIe CardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.